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From: Mekeor Melire <mekeor@posteo.de>
Newsgroups: comp.emacs
Subject: Re: derive from an Emacs package without modifying it
Date: Thu, 11 Sep 2025 23:25:51 +0200
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2025-09-11 19:03 walthervondervogelweide@gmx.de:

> My question is, how do I mitigiate these requirements? The
> changes are e. g. in a core defstruct of ejira. I would have to
> change these back to default in order to make ejira3 useful to
> others.

Maybe you can just redefine the struct in your personal
code. Redefining seems to work as expected. For example, here I
define a struct with slot "sex", then redefine it with "slot"
"replaced" with "gender":

    ;; -*- lexical-binding: t; -*-
    (require 'cl-lib)

    (cl-defstruct person first-name age sex)
    ;; => person

    (mapcar #'cl--slot-descriptor-name
            (cl--struct-class-slots
             (plist-get (symbol-plist 'person) 'cl--class)))
    ;; => (first-name age sex)

    (cl-defstruct person first-name age gender)
    ;; => person

    (mapcar #'cl--slot-descriptor-name
            (cl--struct-class-slots
             (plist-get (symbol-plist 'person) 'cl--class)))
    ;; => (first-name age gender)